{description: 'All codes in the ISO-8601-Derived Periods code system. Note that this value set cannot be expanded because this set is effectively infinite, the set of all possible intervals of time.', package_name: hl7.fhir.uv.cqm, name: ISO8601DerivedPeriods, type: null, package_version: 1.0.0, class: unknown, kind: null, url: 'http://terminology.hl7.org/ValueSet/iso-8601-derived-periods', version: 1.0.0}